diff --git a/docs/superpowers/specs/2026-08-05-workflow-chain-view-design.md b/docs/superpowers/specs/2026-08-05-workflow-chain-view-design.md
new file mode 100644
index 0000000..7da0d21
--- /dev/null
+++ b/docs/superpowers/specs/2026-08-05-workflow-chain-view-design.md
@@ -0,0 +1,32 @@
+# Maestro Workflow 체인 시각화 설계 (대시보드)
+
+- 날짜: 2026-08-05
+- 상태: 확정 (이메일 유스케이스 잔여 — 운영자가 이전 단계를 보고 결정)
+- 범위: `workflow/src/` 하위만 (서버 무변경 — 기존 chain API 사용)
+
+## 1. 동작
+
+- **ChannelBoard 카드**: `parentRequestId`가 있는 요청에 "🔗 체인" 배지 표시.
+- **DecisionSheet**: 선택한 요청이 체인에 속하면(App이 `chain` prop 전달)
+  상단에 컴팩트 타임라인 표시 — 체인의 각 요청을 순서대로
+  `subjectType · title · 상태(결정됨/대기)`로, 현재 요청은 강조.
+  체인 로드 실패 시 조용히 생략(기존 "체인 이전 요청: id" 라인 유지).
+- **App**: 요청 선택 시 `parentRequestId`가 있으면 `fetchRequestChain`으로
+  체인을 불러 sheet에 전달. 없으면 즉시 열림(로딩 블로킹 없음 — 체인은
+  도착하는 대로 표시).
+
+## 2. api.js
+
+`fetchRequestChain(requestId)` → `GET /api/decision-requests/:id/chain`
+(기존 토큰 상태 재사용 — 운영자/서버 토큰).
+
+## 3. 테스트
+
+- ChannelBoard: parentRequestId 카드에 배지, 없는 카드엔 없음.
+- DecisionSheet: chain prop 타임라인 렌더(순서·현재 강조·상태 라벨).
+- App: 체인 요청 선택 시 fetchRequestChain 호출 + sheet에 표시 (mock).
+
+## 4. 비범위
+
+레인 자체를 체인으로 묶는 보드 재배치, 서버 변경, 체인 내 결정 코멘트
+전문 표시(타이틀·상태만).
diff --git a/workflow/src/App.chain.test.jsx b/workflow/src/App.chain.test.jsx
new file mode 100644
index 0000000..9523d1c
--- /dev/null
+++ b/workflow/src/App.chain.test.jsx
@@ -0,0 +1,70 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { render, screen } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+
+const fetchPendingRequests = vi.fn();
+const fetchRequestChain = vi.fn();
+vi.mock('./lib/api.js', () => ({
+  WS_URL: 'ws://test',
+  fetchPendingRequests: (...args) => fetchPendingRequests(...args),
+  fetchHistory: vi.fn().mockResolvedValue([]),
+  decideRequest: vi.fn(),
+  fetchRequestChain: (...args) => fetchRequestChain(...args),
+  loadServerToken: vi.fn().mockReturnValue(''),
+  getServerToken: vi.fn().mockReturnValue(''),
+  setServerToken: vi.fn(),
+}));
+
+import App from './App.jsx';
+
+class FakeWebSocket {
+  send() {}
+  close() {}
+}
+
+describe('App 체인 시각화', () => {
+  beforeEach(() => {
+    vi.stubGlobal('WebSocket', FakeWebSocket);
+    fetchPendingRequests.mockReset();
+    fetchRequestChain.mockReset();
+  });
+
+  it('체인 요청 선택 시 체인을 불러 시트에 타임라인으로 보여준다', async () => {
+    const reply = {
+      requestId: 'dcr_2',
+      parentRequestId: 'dcr_1',
+      subjectType: 'email-reply',
+      actorId: 'agent_mail',
+      subject: { title: '답장 초안 v1', summary: '', payload: {} },
+    };
+    fetchPendingRequests.mockResolvedValue([reply]);
+    fetchRequestChain.mockResolvedValue([
+      { requestId: 'dcr_1', subjectType: 'email-triage', status: 'decided', subject: { title: '메일 분류' } },
+      { ...reply, status: 'pending_decision' },
+    ]);
+
+    const user = userEvent.setup();
+    render(<App />);
+    await user.click(await screen.findByText('답장 초안 v1'));
+
+    expect(fetchRequestChain).toHaveBeenCalledWith('dcr_2');
+    const timeline = await screen.findByLabelText('결정 체인');
+    expect(timeline.textContent).toContain('메일 분류');
+  });
+
+  it('체인 없는 요청은 체인 조회를 하지 않는다', async () => {
+    fetchPendingRequests.mockResolvedValue([{
+      requestId: 'dcr_solo',
+      subjectType: 'spend',
+      actorId: 'agent_a',
+      subject: { title: '단독 요청', summary: '', payload: {} },
+    }]);
+
+    const user = userEvent.setup();
+    render(<App />);
+    await user.click(await screen.findByText('단독 요청'));
+
+    expect(fetchRequestChain).not.toHaveBeenCalled();
+    expect(screen.queryByLabelText('결정 체인')).not.toBeInTheDocument();
+  });
+});
diff --git a/workflow/src/App.jsx b/workflow/src/App.jsx
index 8275152..96f9431 100644
--- a/workflow/src/App.jsx
+++ b/workflow/src/App.jsx
@@ -8,6 +8,7 @@ import {
   decideRequest,
   fetchHistory,
   fetchPendingRequests,
+  fetchRequestChain,
   getServerToken,
   loadServerToken,
   setServerToken,
@@ -19,6 +20,7 @@ const MAX_RECONNECT_DELAY_MS = 15000;
 export default function App() {
   const [requests, setRequests] = useState([]);
   const [selected, setSelected] = useState(null);
+  const [selectedChain, setSelectedChain] = useState(null);
   const [connected, setConnected] = useState(false);
   const [showHistory, setShowHistory] = useState(false);
   const [history, setHistory] = useState([]);
@@ -106,17 +108,32 @@ export default function App() {
       {showHistory ? (
         <HistoryPanel entries={history} />
       ) : (
-        <ChannelBoard requests={requests} onSelect={setSelected} />
+        <ChannelBoard
+          requests={requests}
+          onSelect={(request) => {
+            setSelected(request);
+            setSelectedChain(null);
+            if (request.parentRequestId) {
+              // 체인 로드는 논블로킹 — 도착하는 대로 시트에 타임라인 표시 (스펙 2026-08-05 §1)
+              fetchRequestChain(request.requestId).then(setSelectedChain).catch(() => {});
+            }
+          }}
+        />
       )}
       {selected ? (
         <DecisionSheet
           request={selected}
-          onClose={() => setSelected(null)}
+          chain={selectedChain}
+          onClose={() => {
+            setSelected(null);
+            setSelectedChain(null);
+          }}
           onDecide={(decision, comment) => {
             decideRequest(selected.requestId, { decision, comment })
               .catch(() => {})
               .finally(() => {
                 setSelected(null);
+                setSelectedChain(null);
                 reload();
               });
           }}
diff --git a/workflow/src/components/ChannelBoard.jsx b/workflow/src/components/ChannelBoard.jsx
index 871510b..321f1bf 100644
--- a/workflow/src/components/ChannelBoard.jsx
+++ b/workflow/src/components/ChannelBoard.jsx
@@ -23,6 +23,9 @@ export default function ChannelBoard({ requests, channelCount = 4, onSelect }) {
               <span className="mr-2 rounded bg-indigo-600/70 px-1.5 py-0.5 text-[10px] uppercase">
                 {request.subjectType}
               </span>
+              {request.parentRequestId ? (
+                <span className="rounded bg-slate-700 px-1.5 py-0.5 text-[10px] text-indigo-300">🔗 체인</span>
+              ) : null}
               <span className="block mt-1 text-sm font-medium">{request.subject.title}</span>
               <span className="block text-xs text-slate-400">{request.actorId}</span>
             </button>
diff --git a/workflow/src/components/ChannelBoard.test.jsx b/workflow/src/components/ChannelBoard.test.jsx
index 7cba3dc..1da3fa1 100644
--- a/workflow/src/components/ChannelBoard.test.jsx
+++ b/workflow/src/components/ChannelBoard.test.jsx
@@ -35,3 +35,19 @@ describe('ChannelBoard', () => {
     expect(onSelect).toHaveBeenCalledWith(requests[1]);
   });
 });
+
+it('체인에 속한 요청 카드에 체인 배지를 표시한다', () => {
+  render(
+    <ChannelBoard
+      requests={[
+        { requestId: 'dcr_1', subjectType: 'email-triage', actorId: 'agent_mail', subject: { title: '분류', payload: {} } },
+        { requestId: 'dcr_2', parentRequestId: 'dcr_1', subjectType: 'email-reply', actorId: 'agent_mail', subject: { title: '답장', payload: {} } },
+      ]}
+      onSelect={() => {}}
+    />,
+  );
+  const notes = screen.getAllByTestId('decision-note');
+  expect(notes.some((note) => note.textContent.includes('체인'))).toBe(true);
+  const rootNote = notes.find((note) => note.textContent.includes('분류'));
+  expect(rootNote.textContent.includes('체인')).toBe(false);
+});
diff --git a/workflow/src/components/DecisionSheet.jsx b/workflow/src/components/DecisionSheet.jsx
index 8971367..1427ed4 100644
--- a/workflow/src/components/DecisionSheet.jsx
+++ b/workflow/src/components/DecisionSheet.jsx
@@ -9,7 +9,7 @@ const SECONDARY_ACTIONS = [
 ];
 
 // 결정 시트: 상세 표시 + 승인/반려. 반려는 사유 칩 + 자유 입력 (본체 터치 반려 시트 패턴 계승).
-export default function DecisionSheet({ request, onDecide, onClose }) {
+export default function DecisionSheet({ request, onDecide, onClose, chain = null }) {
   const [rejecting, setRejecting] = useState(false);
   const [reason, setReason] = useState('');
   const highlight = formatPresetHighlight(request.subjectType, request.subject.payload);
@@ -42,7 +42,19 @@ export default function DecisionSheet({ request, onDecide, onClose }) {
           {JSON.stringify(request.subject.payload, null, 2)}
         </pre>
         <div className="mt-2 text-xs text-slate-500">요청자: {request.actorId}</div>
-        {request.parentRequestId ? (
+        {chain && chain.length > 1 ? (
+          <ol className="mt-3 space-y-1 rounded-lg bg-slate-800/60 p-2 text-xs" aria-label="결정 체인">
+            {chain.map((item) => {
+              const isCurrent = item.requestId === request.requestId;
+              return (
+                <li key={item.requestId} className={isCurrent ? 'font-semibold text-indigo-300' : 'text-slate-400'}>
+                  {item.subjectType} · {item.subject?.title} · {item.status === 'pending_decision' ? '대기' : '결정됨'}
+                  {isCurrent ? ' ← 현재' : ''}
+                </li>
+              );
+            })}
+          </ol>
+        ) : request.parentRequestId ? (
           <div className="mt-1 text-xs text-indigo-300">체인 이전 요청: {request.parentRequestId}</div>
         ) : null}
 
diff --git a/workflow/src/components/DecisionSheet.test.jsx b/workflow/src/components/DecisionSheet.test.jsx
index 6a0eb92..a10c1f2 100644
--- a/workflow/src/components/DecisionSheet.test.jsx
+++ b/workflow/src/components/DecisionSheet.test.jsx
@@ -52,6 +52,31 @@ describe('DecisionSheet', () => {
     expect(onDecide).toHaveBeenCalledWith('revise', '');
   });
 
+  it('chain prop이 있으면 타임라인을 렌더하고 현재 요청을 강조한다', () => {
+    render(
+      <DecisionSheet
+        request={{
+          requestId: 'dcr_2',
+          parentRequestId: 'dcr_1',
+          subjectType: 'email-reply',
+          actorId: 'agent_mail',
+          subject: { title: '답장 초안 v1', summary: '', payload: {} },
+        }}
+        chain={[
+          { requestId: 'dcr_1', subjectType: 'email-triage', status: 'decided', subject: { title: '메일 분류' } },
+          { requestId: 'dcr_2', subjectType: 'email-reply', status: 'pending_decision', subject: { title: '답장 초안 v1' } },
+        ]}
+        onDecide={() => {}}
+        onClose={() => {}}
+      />,
+    );
+    const timeline = screen.getByLabelText('결정 체인');
+    expect(timeline.textContent).toContain('메일 분류');
+    expect(timeline.textContent).toContain('결정됨');
+    expect(timeline.textContent).toContain('대기');
+    expect(timeline.textContent).toContain('← 현재');
+  });
+
   it('parentRequestId가 있으면 체인 이전 요청을 표시한다', () => {
     render(
       <DecisionSheet
diff --git a/workflow/src/lib/api.js b/workflow/src/lib/api.js
index d1a420e..5f1cbec 100644
--- a/workflow/src/lib/api.js
+++ b/workflow/src/lib/api.js
@@ -54,6 +54,12 @@ export function decideRequest(requestId, { decision, comment = '' }) {
   });
 }
 
+// 체인 시각화 (스펙 2026-08-05): 선택 요청의 결정 체인 전체 조회 (운영자/서버 토큰)
+export async function fetchRequestChain(requestId) {
+  const body = await requestJson(`/api/decision-requests/${encodeURIComponent(requestId)}/chain`);
+  return body.items || [];
+}
+
 export async function fetchHistory(limit = 40) {
   const body = await requestJson(`/api/history?limit=${limit}`);
   return body.items || [];